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    METHOD FOR ENCODING/DECODING IMAGE AND DEVICE THEREOF
    16.
    发明申请
    METHOD FOR ENCODING/DECODING IMAGE AND DEVICE THEREOF 有权

    公开(公告)号：US20210168401A1

    公开(公告)日：2021-06-03

    申请号：US16606258

    申请日：2017-04-18

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Min-soo PARK ,  Ki-ho CHOI

    IPC: H04N19/61 ,  H04N19/172 ,  H04N19/119 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/174

    Abstract: Provided are an image decoding method and an image decoding device for performing the image decoding method. The method of decoding an image includes determining at least one coding unit for splitting a current frame that is one of at least one frame included in the image, determining at least one prediction unit and at least one transformation unit included in a current coding unit that is one of the at least one coding unit, obtaining residual sample values by inversely transforming a signal obtained from a bitstream, obtaining a modified residual sample value by performing a rotation operation on the residual sample values included in a current transformation unit that is one of the at least one transformation unit, and generating a reconstructed signal included in the current coding unit by using a predicted sample value included in the at least one prediction unit and the modified residual sample value. The rotation operation is performed by applying a rotation matrix kernel to coordinates including a first residual sample value and a second residual sample value included in the residual sample values.

    VIDEO ENCODING METHOD AND APPARATUS, AND VIDEO DECODING METHOD AND APPARATUS
    18.
    发明申请
    VIDEO ENCODING METHOD AND APPARATUS, AND VIDEO DECODING METHOD AND APPARATUS 审中-公开

    公开(公告)号：US20180359469A1

    公开(公告)日：2018-12-13

    申请号：US15778681

    申请日：2016-11-22

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Kwang-hyun WON ,  Chan-yul KIM ,  Sun-il LEE ,  Ki-ho CHOI

    IPC: H04N19/105 ,  H04N19/513 ,  H04N19/159 ,  H04N19/44 ,  H04N19/176

    Abstract: Provided are methods and apparatuses for encoding and decoding a coding unit of a picture outline. An image decoding method includes obtaining a prediction mode and prediction information of a current block included in a current image, from a bitstream; reconstructing the current block based on at least one of the prediction mode and the prediction information of the current block; when the prediction mode of the current block is a first prediction mode, obtaining a prediction candidate related to a second prediction mode by performing prediction according to the second prediction mode based on the reconstructed current block; and reconstructing an adjacent block reconstructed after the current block by using the prediction candidate related to the second prediction mode.

    DEVICE AND METHOD FOR ENTROPY ENCODING AND DECODING
    19.
    发明申请
    DEVICE AND METHOD FOR ENTROPY ENCODING AND DECODING 审中-公开

    公开(公告)号：US20180205972A1

    公开(公告)日：2018-07-19

    申请号：US15743498

    申请日：2016-07-25

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Yin-ji PIAO ,  Ki-ho CHOI

    IPC: H04N19/91 ,  H04N19/119 ,  H04N19/44 ,  H04N19/105

    CPC classification number: H04N19/91 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/157 ,  H04N19/18 ,  H04N19/44 ,  H04N19/70 ,  H04N19/865

    Abstract: An entropy encoding device and method, and an entropy decoding device and method are disclosed. The entropy encoding method comprises the steps of: dividing a transform unit into a plurality of zones, and dividing each of the plurality of zones into sub zones; setting, as the first value, the value of the last zone flag, in which a sub zone including a valid transform coefficient among the plurality of zones is included, and setting, as the second value, the value of a zone flag of the remaining zones; setting, as the first value, the value of a sub zone flag of the divided sub zones having the valid transform coefficient, and setting, as the second value, a value of a sub zone flag of the divided sub zones which do not include the valid transform coefficient; determining a preset coefficient coding scheme among a plurality of coefficient coding schemes on the basis of the zone flag and the sub zone flag; encoding a coefficient included in a sub zone on the basis of the determined coefficient coding scheme; and transmitting data on the zone flag, the sub zone flag, and the encoded coefficient.

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